Antiskid device for motor vehicles



' 1. 1,621,138 March 15 1927. c SILVERTHORN I ANTISKID DEVICE FOR MOTORVEHICLES Filed Oct. 21, 1925 fly v Z Patented Mar. 15,1927.

CHARLES SILVER THORN, OF PONTIAC, MICHIGAN.

AN'IISKID DEVICE FOR MOTOR VEHICLES.

Application filed October 21, 1925. Serial No. 63,882.

This invention relates to an anti-skid device for motor vehicles and thelike.

The object of this invention is to provide a device for a motor vehiclecapable of iovement into and out of engagement with the tractive surfaceover which the vehicle is travelling to prevent undesirable sidemovement on skidding.

This invention embodies a pair of discs carried by a hanger from therear axle and operating means therefor including a lever, connectingcables and a tension spring.

Other objects will more clearly hereinafter appear by reference to theaccompanying drawings forming a part of this specification and whereinlike numerals of reference designate corresponding parts throughout theseveral views, in which Figure 1 is a top plan View of a chassis showingthe present invention in elevated position;

Figure 2 is a vertical sectional view of the chassis with the devicepositioned as in Figure 1; and' Figure 3 is a view similar to Figure 2with the device in lowered position.

In'the present illustration of the inven: tion, a vehicle is illustratedand includes the frame 1, front axle 2 and rear axle 3. A pair of spacedhangers more clearly illu'strated in Figures 2 and 3, are mounted on therear axle 3. These hangers include upper clamps4 which engage the axleat points adjacent the two rear wheels, shank portions 5 and lowerboxings '6 through which the shaft 7 extends. Discs 8 are mounted on theextremities of the shaft 7 and are positioned by any suitable means toprevent lateral movement. Cross braces 9 connect thespaced shanks 5 andform a rigid framework capable of unitary movement by means hereinafterdescribed.

For operating the present device, any suitable control lever may beutilized. In the present embodiment a hand lever 10 is shown as pivotedin a positionto be operated from the driver's seat. 7 A. cable 11extends from the lever at a point 12 downward over the pulley 14:extending beneath thevframe rearward to a similar pulley 15 mounted onthe rear cross frame and over this latter pulley to a central point onthe shaft 7 to which it is secured. The aforesaid arrangement obviouslyis designed to move the device upward free from contact withthe ground.To

move the discs into ground engaging position, the two cables'16 areprovided. These cables are secured to points on the disc carrying shaftadjacentits extremities'and are united at .17 at which point thetension' spring 18 is positioned. The forward end of the spring 18 isconnected by cable 19 to the lever 10 and is caused to move the discsinto engaging position by the 'forward' movement/of the lever.

In connection with the use and operation of the present invention, itwill be readily seen that the device is intended for use underconditions when a vehicle is inclined to skid laterally of its path oftravel and under such circumstances an operator, by the manipulation ofthe lever, can cause the discs to engage the ground with substatiallyany degree of pressure. The provision of the spring permits thefunctioning of the discs over irregular surfaces and facilitates theoperation'of the same. Normally the entire arrangement will be free frominterference with the movement of the vehicle. Many changes in thedetails of construetion and arrangement of parts may be made withoutdeparting from the spirit of the invention.

'lVhat I claim is: The combination with a vehicle wheel supportedchassis having a rear axle, of a pair of depending brackets pivotallyconnectedto the rear axle, a shaft connected to the lower ends of saidbrackets, small antiskid wheels mounted on the last mentioned shaft andadapted to be broughtin contact with the pavement, or to be moved awayfrom the pavement, brace rods connecting the brackets, a pulley mountedon the chassis rear-. wardly of the rear axle, a lever pivotally iountedon the chassis forwardly of the rear axle, a second pulley mounted onthe chassis forwardly of said lever, a cable having one of its endsconnected to the lever, and its other end connected to the shaft of theanti-skid wheels, said cable passing over the first mentioned pulley andunder the second pulley, cable branches connected to said brackets andconverging forwardly, a tension spring connected to the forward ends ofsaid branches, and a second cable connecting the spring to said lever.

In testimonywhereof I aflix my signature. j

CHARLES SILVERTHORN.

